OZONE. 245 



the rapid spread of mumps. (Ozone three to four) . As 

 the spring opened there were shght catarrhal diseases, 

 following the increase of ozone until the twenty-fifth of 

 May, when there were several severe cases of pneumonia, 

 most of which experienced recurrent attacks. This pre- 

 disposition to lung disease continued nearly up to the first 

 of July, passing into a period of general health, following 

 in August with dysentery (ozone five) among children, 

 which gradually increased until many adult people were 

 sick with cholera morbus, and at length it assumed a fa- 

 tal form, carrying ofFin this section several oldish people, 

 death being preceded by convulsive attacks, general in 

 their nature, about forty-eight hours after the commence- 

 ment of the disease. (Ozone one) . 



The last of September this disease assumed a more 

 manageable form and soon disappeared entirely, but in a 

 few days, or by the fifteenth of October a large majority 

 of the people were suflering more or less from catarrhal 

 difficulties, which they denominated cold in the head. 

 (At this time ozone was at nine). This state of disease 

 continued with now and then a case of pneumonia until 

 December, which was a month of general health, (with 

 ozone averaging five). In January 1S72 there was much 

 whooping-cough, but with that exception little disease and 

 general good health prevailed. Through the summer 

 there were no typical diseases. (Ozone about medium). 



The last of August a few cases of cholera infantum oc- 

 curred, but none were fatal. There was an occasional case 

 of lung fever in November, with the horse-disease or epi- 

 zootic all about us, but it did not reach Lunenburgh until 

 the fifteenth of November and was at its hight about the 

 twenty-fifth. (Ozone nine). It seemed to appear in cen- 

 tral Vermont first and with greater severity which would 

 accord with ozone here, but it seemed more fatal in our 



